Not to bring this topic to heat again but how about making the reactors more expensive the more you have them? Cumulative costs or whatever it is. Just the initial building cost should rise.
That way the early game will remain the same but later stages losing a reactor will cost you. But then again it won't be a huge hit to your economy since in the late game you should have money rolling in anyway.
No. Emphatically
no. This game is so punishing right now with how much time everything takes. If you think about it, what adds the most emotional weight to the decision-making process is that losing your entire fleet or losing planets is actually a big deal because they cost a lot and that takes time. That is the negative feedback to the player. You could easily extend that to any object in the game, but how fun would that be?
I don't want to see that punishment extended to reactors, especially when losing them pulls down all of your shields. Games usually take just over 10 hours, sometimes up to 20 depending on the level I'm playing at, and I don't really want any more than that because it becomes a slog.
As far as having "a huge hit" to your economy, efficient players like myself are always broke. From a design standpoint, you have to be able to cater to everybody, but if you alienate hard-core players, you probably have a design problem because they are the measure of its depth.